Illitjs augustus timmis



(No Model.)

1. A. TIMMIS. ELECTRO MAGNET.

No. 506,282. Patented oct. 1o, 1893.

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UNITED STATES PATENT `OFFICE.

ILLIUS AUGUSTUS TIMMIS, OF LONDON, ENGLAND.

ELECTROFMAGNET.

SPECIFICATION forming part of Letters Patent No. 506,282, dated October 10, 1893. Application tiled February 1, 1893. Serial No. 460.622. (No model.) Patented in England October Z2, 1892, No. 18,994.

To all whom it may concern:

Be it known that I, ILLIUS AUGUSTUS TIM- MIS, a subject of the Queen of Great Britain and Ireland, residing at 2 Great George Street, Westminster, London, in the county of Middlesex, England, have invented certain new and useful Improvements in Electro-Magnets, (for which I have obtained a patent in England, No. 18,994, dated October 22, 1892;) and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being made to the accompanying drawings, in which similar letters refer to similar parts in the several figures.

. Figure l represents an electromagnet partly 1n crosssection. Figs. 2, 3, 4, and 5 represent modifications of my present invention. Figs. 6and7 represent a compound eleotromagnet.

My present invention has for its object to utilize the great magnetic attractive force exercised by a coil or coils of copper or other Wire, having a current of electricity flowing through them, where they are not incasedin, or surrounded by, magnetizable metal such as soft iron, an armature of suitable shape and metal, such that when the pull or suck 1s 1n action and the armature and bobbin are coming together the pull is increased as the magnetizable surfaces come closer, and then when these surfaces of the armature and bobbin are in contact or practically so, the holding power between the armature and bobbin is Very great with a minimum consumption of electrical energy.

In Fig: l, d is the armature of magnetizable metal and is composed of a top plate a, a center rod c (which may be hollow); ois an outer rim, fr isan inner tube (or itmay be a rod) of magnetizable metal, and tis an outer tube of Pthe same metal. t and 0 are joined together by a base plate p. t' is a rod attached to the center rod c, the rod t' being of nonmagnetizable metal. b is a casing of nonmagnetizable metal which is used to keep the helix h in its proper place.

In Figs. ,v2 and 3 there is a double coil helix or bobbin h, h; 71, being of finer wire than h. In Fig. 2 the lengths of r and t are reduced. In Fig. 3 the outer tubet is dispensed with.

rod c but r is extended to the top so that a may come against it.

Figs. 6 and 7 show a compound magnet having three bobbins with three center rods and one common outside tube on the armature and also on .the bobbin. There may be any number of bobbins and there may be rods placed in any of the openings 00,00.

The main objects I have in View are the combination in an electromagnet of apowerful pull or suck on the center rod c oron the outer rim o or on both, by means ot an electric current passing through the helix or bobbin of wire-Where it is not incased in magnetizable metal-together with the extra attractive force exercised by the magnetizable metal about the bobbin when that of the armature is coming near it; then the enormous holding power exercised when the magnetizable parts of the bobbin and armature are in contact or practically so, and lastly the utilizing of thebobbin of finer wire h', by switching it (automatically or otherwise) in circuit with the coil 7L and in series With it, when the bobbin and armature are together (or nearly so) to reduce and economize the expenditure of electric energy when the pull has to be maintained.

Magnetizable metal means any metal which is available and which readily magnetizes and demagnetizes. Vire means in' sulated wire of any suitable conductivity metal.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. An electronnagnet, consisting of the core r having abase plate p of magnetizable metal, and the bobbin b of non-magnetizable metal provided with one or more coils of wire h and arranged around the said core with its flanges wholly covering the ends ot the Wires; in combination with an armature consisting of a plate ct provided with a rim 0 adapted to slide over the top of the said coil,'and a central portion c adapted to slide within the said bobbin, substantially as set forth.

2. An electro-magnet, consisting ofthe core IOO Mlaving a base plato p, and the outer tube t, all of magnetzable metal, and the bobbu l? of nou-maguetizable metal provided with one or more coils of Wire hand arrangedbetweeu the said core and tube; iu combination with au armature consisting of a plate a provided with a rim 0 adapted to slide over the top of the said coiLa central portion c adapted to slide Within the said bobbiu, and u rod z' adapted to pass through a vertical hoein the [o said core, substantially as set fol-th.

ILLIUS AUGUSTUS TIMMIS.

'Vitnesses:

CHAS. ROCHE, HARRY PETER VENN. 

